Spray-head.



' sar rN'r FFlCE.

THOMAS A. DE VILBISS, OF TOLEDO, OHIO, ASSIGNOR T THE DE VILBISS MANUFAC- TURING COMPANY, OFTOLEDO, OHIO, A

CORPORATION cromo.

SPRAY-HEAD.

lessees.

resident of Toledo, in the county ot' Lucas and State ot' Ohio. have invented a eer-tain new and useful Spray-Head; and l do here- Aao by declare the following; to be a full, clear. and exact description 'ot the invention, such as will enable. others skilled in the art to which it appertains to make and use the saine, reference being had to the accompanying drawings. and to the figures of reference markedthereon, which form a part* ot' this specifica-tion.

My invention relates to spray-heads for atornizers or other virnstlruments in which t-he discharge ofv a fluid utider pressuret'rorn one of tivo v-tubes through a throat common to both creates a suction through the other of said tubes and a discharge of liquid in spray or vaporized form from such throat.

In the construction of spray-heads of this type it is important that the discharge end of one tube be accurately centered within the spi-ayftead and as close to t-he discharge end thereof as possible, and to accomplish this ithas been customary to tit the rear end of the spray-head into the end of .the outer tube and onto the end ot the inner tube to the rear of the restricted oryreduced nozzle end of such latter tube, or in some other similar manner.

The object of my invention is tol improve upon the construction ot spray-heads and the manner or" centering a tube end therein. whereby the nozzle of such tube is supported close to its end Within the reduced portion of the throat of the spray-head. thus simplitying the manufacture and assembling ot the parts of this class ot apparatus and enhancing the practicability and conuwrcial value thereof. as is hereinafter nxore 'fully described.

The operation, construction and arrangement of the parts ot thc in .'entien are fully described in the following` specification7 and a preferred embodiment thereof and manner of forming the saine illustrated in the accompanying drawings5 in Which-- Figure 1 is a central longitudinal section of a spray-head embodying my invention With the inner and outer tubes associated therewith. Figs. 2, 3 and 4 are similar enlarged sections of the spray-head at different stages of theshaping process, and Figs. 5

Specification of Letters Patent.

Application inea Apni 30, 1509.

Patented Feb. 4,1913. Serial No. y493,191.

and (S are cross-sections on the line .fr m in Fig. 4, the latter with the inner nozzle projected therein.

Referring to the drawings, l designates the outer tube ot an atomizer. 2 the inner tube thereof. which has its discharge end projected beyond the end of thetube 1 and reduced to torni the restricted discharge nozzle i. and 4 the spray-head, which is threaded or otherwise suitably secured Within the outer end ot the tube l and provided with the central,longitudinal bore or throat 5 into which the discharge end of the tube Q projects. throat 5 is of suitable size to receive the large portion of the tube 2 and to provide a space around the same for the passage of fluid from the outer tube 1 through the spray-head. and has its outer end portion ot' the tube 2 and provide a space therearound. as shown in Figfl.

For the purpose of accurately centerilner the nozzle 3 within the restricted portion 6 ot' the spray-head throat, such portion is further restricted at its inner end in polygonal or irregular forni to provide a plurality of annular-ly spaced points of contact for thc nozzle around the interior of the head, asshotvn in Figs. 1 and 6.

simple method oit accomplishiingr this consists in inserting a suitable tool 7 Within the large end of the bore 5 and forcing it reduced. as at 6, to receive the reduced end against, the shoulder 8 therein to etlect aninward upsetting` of such shoulder, as shown at 9. said upsetting' being restricted by a teat 10. which is substantially7 the saine in diameter as the nozzle 3 oi the tube 2 and projects centrally trom the end ot the tool. On the Withdrawal ot the tool 7, a tool 11. which has its end tapering` to a point and preferably square or other polygonal. shapein cross-section, inserted into the large end of the throat-and its tapered end forced Within the upset portion S thereof to iinpart a shape thereto which is other than round. as shown in Fig'. 5, whereby to provide a plurality of points of contact tor the nozzle fl. which is intended to tit snugly therein. I

The centering' o t' the nozzle 9a within the spray-head throat in the manner shown has many advantages over the old method heretofore employed ot centering' the inner tube within the spray-head tothe rear of the nozilo zie, as the nozzle is thereby prevented from 7 lateral displacement in the restricted Vportion of the bore,the luid'has. unrestricted ed* -mission to the spray-head throat from the outer tube 1',- and the manufacturing and :1s-l sembling of the parts is simplified.

I Wish it understood that my invention is not limited 'to any speciciconstruction o1? arrangement of parts except in so far as such limitations A'are specified in vthe claim.

Having thus described .my invention, what I claim :is new and desireto secure by letT ters Pate-nt, is,- i

In an-atomizer, the 'combination With'an outer tube, of an inner tube having its .discharge-end reduced and projecting beyond' the end of the outer tube to form e discharge nozzle, aispray head connected to the outer extremityofthe. outert'ube and hev'lnga centralbore to receive the outer extremity of the inner tube, a squared shoulder provided in the bore of the spray head, and spaced projections integral' with. the shoulder, said projections receiving the reducedf'discharge extremity of .the yinner tube and *supporting the sifhe centrally of the outer tube.

In testimony whereof I huye hereunto PUnELL SQHIBER; 

